{
  "manageEntity": {
    "action": "Save",
    "entityId": "2146389865",
    "entityType": "Track",
    "nonce": "0x97e22c7616bb22a25c91d48665c46d410d2aadcd81748743630a3c01df2c758d",
    "signature": "0xc555f632f289a2d00beaaedc54a3723488b0f630b83b8bcd700281528d5560a403d479dc8d9a481dbb3d604f84c85dbb5e8f0dae6dac11b999499f6a1f1ba9e31b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}