{
  "manageEntity": {
    "action": "Save",
    "entityId": "1505308024",
    "entityType": "Track",
    "nonce": "0x191018adaba3ff82bb0cd6f06d3c3714969ff940aad999ad079587ac050c69ba",
    "signature": "0xb30909bb22f7983446b41dd95cbc53c5505ee3531556f89e97ce0c319199f8ae2e3532fa27e73ab9a58b45f213845f601cfdc3e81c8ee34f2daa7758eb8c0b851c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}