{
  "manageEntity": {
    "action": "Save",
    "entityId": "440005226",
    "entityType": "Track",
    "nonce": "0x6d09058d72049e0c6ca7e660e87d726e9600e60910cbb7b976fedb4b15b19116",
    "signature": "0xb43b7b96df73613017b8360a9b678803922fd0635f19f76f99c9592c9940791614b09469ac4df952d8080697e55944c91b27b235d91ad6e1972809f3aa594f4b1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}