{
  "manageEntity": {
    "action": "Save",
    "entityId": "1255207723",
    "entityType": "Track",
    "nonce": "0x6f3d0cf8bbe1701767157d10dfa9e6882f7823a397e5f5b149cb0c47d7c31a72",
    "signature": "0x8f7f914fe9b2510790c2fe0620874b0be1068cf9a83a556ccffc430e6e8787674cf14bed204ab180c9794f361628a610d97df10cc458b653f0752c1df403ac651b",
    "signer": "0x92a5082636c97Db0Ae888484D85e4c8494A3B791",
    "userId": "895527427"
  }
}