{
  "manageEntity": {
    "action": "Save",
    "entityId": "2117569854",
    "entityType": "Track",
    "nonce": "0xaf6c0d0c650d0316d850824a4431ed1fc726132340625c5765b37805631dbe76",
    "signature": "0xf8ea5e7150f73c94a96e98e4a5c42a48db85ce6c90bd8aad17ebad339c235fd47fa1889949e92c8afbf3d0f235254c27bcaec37748529743751979b4de945caa1b",
    "signer": "0x040629E31a68119093b9a0111257C8449c2f8e10",
    "userId": "20"
  }
}