{
  "manageEntity": {
    "action": "Save",
    "entityId": "1628745590",
    "entityType": "Track",
    "nonce": "0x5892f8dbb2a08231dbaa4cc97f41204cb1634e4f29537bc8465ad1de84150e36",
    "signature": "0xbe59b83890f5189a03febcd50bf9dbb08b5bae4f2ce60935920744517fffda4b4a248de4b5de5c52420631598ce8d939052621a267cccb03d95e43e2ed74371f1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}