{
  "manageEntity": {
    "action": "Save",
    "entityId": "1091440271",
    "entityType": "Track",
    "nonce": "0x4bcb4bae7deb90e81fc427afdade9f78b1fc669cd4e93ae00779b40a07873a73",
    "signature": "0x65ed772d45a9113ae848cb566029b2322a7221e865acb78f3282538a06583c6f4fa84f264c20d27fbfc50891b613aa5a0fe300284f08e4778d67c412c76765cf1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}