{
  "manageEntity": {
    "action": "Save",
    "entityId": "1385272422",
    "entityType": "Track",
    "nonce": "1788155987587254059",
    "signature": "0x6358961558db3906d099045a3e916b709561c1d2e8e4ddec648b2c1a9e4f21e061b2c61504bd33540ae179c820a13b1c6eb903da7ab2272b313a76809c34a94e1c",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}