{
  "manageEntity": {
    "action": "Save",
    "entityId": "1285198181",
    "entityType": "Track",
    "nonce": "0xa2697d8521f2704950b4b07754c2ec0e63b01b0dbe0c51f8a8975a26fcb20a0d",
    "signature": "0xb88c80a133e4da48493de953b25f5f234a89402c5d6f34f27f59f396ec1c126443743754669d116a6d138997ef9b02c396afaafa57d4031bddb655ce8eb8fb491c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}