{
  "manageEntity": {
    "action": "Save",
    "entityId": "1721958682",
    "entityType": "Track",
    "nonce": "0x45242c09af04f84e674d8c023219818130b6f2040d3fdb7629fc7e611f15a8be",
    "signature": "0x8a285a743df64332f4ab918a2f6c8c08f29f2b5c6008b99abda3081f13da97a833ea3fa4baa4454e60c4eef64b573742428c4e5910b01d220354a71a1ad2863b1b",
    "signer": "0x036B1ee0d2003ae5B5E252d58647d13f0e588EEB",
    "userId": "161353174"
  }
}