{
  "manageEntity": {
    "action": "Save",
    "entityId": "1031118817",
    "entityType": "Track",
    "nonce": "0xf12661bab9cd43287e68ee49964e7c46fb7be2d96cd738c8e5737ff12ad7d560",
    "signature": "0x5923b80e9b74c712b8279c7083614c04ee62424e57eadffe525199dc6d284cb57f3c02c70e229b1765ce47cddce7cb65c2a84316824b72f73a8aaf706aedb45f1c",
    "signer": "0x48997477d821e30d3Fa835d1Ee7809B3253Cb100",
    "userId": "75085"
  }
}