{
  "manageEntity": {
    "action": "Save",
    "entityId": "283688103",
    "entityType": "Track",
    "nonce": "0x45b825766fd1bd1414246d678a7a4df077ab6110a74f43476beebc70db077299",
    "signature": "0x4f3617e4839c007cbf3323eeaee43678665575aec0300bd4d2a72c0516a20df70dad8b36197c134442a1a3fdc2a0478b62feaa8db794e84519a556bd399220881c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}