{
  "manageEntity": {
    "action": "Save",
    "entityId": "423864650",
    "entityType": "Track",
    "nonce": "0xdce6885d204a2e92e8f74239fa8a794dfcaccbb61ae3e7c850b588f3df73acef",
    "signature": "0x83ab95bd7e9f92ed4bbdeb76ea3229eb5aa6a71efd8f8fe32270256298e1e37370446d6670f39fd5670e4d4dfc081ede81c51d7036e3f6fc8ecb50f4950ca2241c",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}