{
  "manageEntity": {
    "action": "Save",
    "entityId": "1105539",
    "entityType": "Track",
    "nonce": "0xe1d9c58671a01bfd193992f3f43364b5ce3234760bfdbedef859e12e5a5d1c96",
    "signature": "0x26384d9cbcd1b15ce564eb2a02ad6f77c7bac7b96aa696c7d1374ed349434272489a06a7ade26ddf0854fac7ca7c8bdf07653a0b6bca587dd7142f2e6e1767ad1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}