{
  "manageEntity": {
    "action": "Save",
    "entityId": "1808875355",
    "entityType": "Track",
    "nonce": "0x338e92cc2f1ad5031cde58e20fae27fd7eb118504aae657b8fe240f445883294",
    "signature": "0x51b28cc7f9ecac1cb860d9f2859aeb762193ebdde1bae17c2f1b850df26ea4ff452a8c539551bdb2650cdf88f820ea67c51db80a27bbb438e4830add491a0b371b",
    "signer": "0xF66719AC0E8463f8c9660B4412B4972e1dB48183",
    "userId": "57021"
  }
}