{
  "manageEntity": {
    "action": "Save",
    "entityId": "1012100",
    "entityType": "Track",
    "nonce": "0x4805f5808e0b5732f9f73eec77cad46a8b8690c368f5a081f3acad50da2d6764",
    "signature": "0x5c14d7451ee995fdea5758ddaee7641b305acd5ccb624c052bf1ec812a0a062d44a6388d5cc9f16848e532639a7c7598f9d09f9fdd0a9dc568fc83ba981f44221b",
    "signer": "0x90CBf7c9BBF688fd9Fa4029B96e1BC32b270cA24",
    "userId": "711459379"
  }
}