{
  "manageEntity": {
    "action": "Save",
    "entityId": "1261806044",
    "entityType": "Track",
    "nonce": "0x70b0a064d8382eb5ebc30fc12c70da39bbb8d5d554e5717fda28330185a36b2a",
    "signature": "0x59f5a2eae2f18e83e238a679f9063f5ae44426403fdae290e5f9bb51c8e6f1d639949c4b4e645d868502b65f86a9c9df18267222114fab3f34fe44e0f0ae68351c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}