{
  "manageEntity": {
    "action": "Save",
    "entityId": "242563728",
    "entityType": "Track",
    "nonce": "1792294679507908243",
    "signature": "0x6322cc6f43d8f20cf650c2b14fb1e4faf54423ec1e80d12086701f5a1ba2059a5471aa2f4e4d86eb19bd085d42c28c58057a759e7c4a628523ca203e65550e0f1c",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}