{
  "manageEntity": {
    "action": "Save",
    "entityId": "911901407",
    "entityType": "Track",
    "nonce": "0x05223e74f5838469e342429de647cdf036d27072162686caa32e161e2e0f3aa8",
    "signature": "0x3aef55e32640a6c5ddf4585c7bc5182429451d8a0b8d6fb0d5b23926a352401f5b39236f5ad5542b67472f00a905f6bb06808f50072e0cb891510216eeef84051c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}