{
  "manageEntity": {
    "action": "Save",
    "entityId": "1956231583",
    "entityType": "Track",
    "nonce": "0x1c90e6551eb4ce3b366bc80f852f0d1986ede77cb7d86e2444e3521af40f83f4",
    "signature": "0x01fb6b424e6ca2421e7084f160e0f8f435bda4dd5c95387599679d103e5918a9594cd26745f3ab07eb9a6a8a6747df0ef38b98d5e4afbc02b7070c4af33bac731c",
    "signer": "0x34Cea527C1dc0575a5B686515aad0Bf8F3b5f97E",
    "userId": "13589021"
  }
}