{
  "manageEntity": {
    "action": "Save",
    "entityId": "2066076308",
    "entityType": "Track",
    "nonce": "0x5f32c294773458cf4eb4370ee5540f5fdca96ae0828d00ac2baf5f2bfee00d83",
    "signature": "0xe272a997d65a5d95b8ab7270a534f0bac3ad9615ccff6481f2fa1af4fbc5fb3d69a432f67e95ef98b3492b1e81f4add50588df9fd98a31fc098630986b3287bc1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}