{
  "manageEntity": {
    "action": "Save",
    "entityId": "1285251961",
    "entityType": "Track",
    "nonce": "0x2eedd944e72a13bf9af367fbcb998fca564011b02d48d1675e5b033bcee0adbf",
    "signature": "0xd92472b101df9e897c5c7f163fa5d4b78a7caa3c9547a3d905187f31c89de4176c38a44a07f426e9b3719fcaad17b19f5686fc92e36c32fef60bb45bcb332dff1b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}