{
  "manageEntity": {
    "action": "Save",
    "entityId": "1945122486",
    "entityType": "Track",
    "nonce": "0xdca67245d87783b65f0be3435b25a27b2fecefa2865103522c16a1d049517326",
    "signature": "0x862bf40df62a82fc620edd715148463886a251f8e468a956a71418010c84143d4796d7f5064d538787d10dc11066b735a98c8fd7bf3fb6e6a1ac91b12e5ebe4e1c",
    "signer": "0x4dafC3e774A1033C5604372f17ccBDcE545f478D",
    "userId": "889450527"
  }
}