{
  "manageEntity": {
    "action": "Save",
    "entityId": "1542913815",
    "entityType": "Track",
    "nonce": "0x9b4ea2b0a26a1e09187132631d3c926283296b784099f3849be42bff2df1b65c",
    "signature": "0xfb85c72359fbc3a498e804342c633573fd2e61c46fd3a6f3e120d72cd39b213e1173b56a9bf5197fea4cd50f95a1a0d06c22e363d691204c3c61f8727afb56701c",
    "signer": "0x90CBf7c9BBF688fd9Fa4029B96e1BC32b270cA24",
    "userId": "711459379"
  }
}