{
  "manageEntity": {
    "action": "Save",
    "entityId": "1003713",
    "entityType": "Track",
    "nonce": "0x0df2496d57ee5a2deec4f729d76beeb7a3195c6452660091461a6ddeb560ec48",
    "signature": "0xb07cee0a885ada7cdd6fa10daefcdde0a4ca210b0bde1a71b21eb45d510a2d3477106b81993a8177f72ac5ee83b895c8f3603fd53c36a614cf272ef7bbdc10d21b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}