{
  "manageEntity": {
    "action": "Save",
    "entityId": "616241735",
    "entityType": "Track",
    "nonce": "0x094f8db20e7dfc4b1ca3cb7456eafdf25b06275c48e9f54e2578090392395d3c",
    "signature": "0x98a469ab420ceaf7fb8c016231a3bbb65e5835c29b01ccb11a993dd7911b695114c3eee50a2e3676d9d92dcb4766a1ac88b9d57ec7da964bae33aa0daca1c0641b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}