{
  "manageEntity": {
    "action": "Save",
    "entityId": "166332080",
    "entityType": "Track",
    "nonce": "0xaec3e04b50b0e88d75ef0828ea5eb7e451559e32cf81017835548d847b4b36de",
    "signature": "0x78d21f1951cb8ddef12f38a762becc9389e6ed2d2a6b8dc2ff8dd2546a016c391f172f2eac6acac0b30a1ac1553730fed396611d18e721ed4c4e3120002fad5e1c",
    "signer": "0x5E1b23614a9da638dba09e8aB2E9B76ed81c688f",
    "userId": "306948669"
  }
}