{
  "manageEntity": {
    "action": "Save",
    "entityId": "851291198",
    "entityType": "Track",
    "nonce": "0x8901013e02ebd4593eb2be902345aebf7ec0597fb092dcc8a6489c610bfc48c9",
    "signature": "0x270da5ed8a095962d8d0d7f7b72273eda8762084a05dcea49614aa5d8a408b3a791bfa64115f6c83c5941fff654a3384b3f7371a2b60b46ad792088f321552471c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}