{
  "manageEntity": {
    "action": "Save",
    "entityId": "220131461",
    "entityType": "Track",
    "nonce": "0xe13db58ae8d25919aa2ff07496cfb4a08e0c38571ceff8068b7f12d0fbac4903",
    "signature": "0x1a548cbe6da1cfd189b5d2870cce8e11c02a906ed54dc030158c9867c2f25b4a62d073dec4c33d7f8f1b37c3d1919a1e560f1e13af142edce663f03d483b3b121c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}