{
  "manageEntity": {
    "action": "Save",
    "entityId": "183489",
    "entityType": "Track",
    "nonce": "0xd5dff8aa898ce421c0d9c605086695ec3dd8b046ee320b1a0d81d85786574e01",
    "signature": "0x7c41de028dbd25e32ecb8f6082f22a148efe4b978fc687c1f49acc073070581e6125996591722f27027940971f20e7ea1003ab18ed2fd39078e7c41f48f386d81b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}