{
  "manageEntity": {
    "action": "Save",
    "entityId": "923515811",
    "entityType": "Track",
    "nonce": "0x9e56cb65e47ba378e2d390635f1c5e20b41ef6abcb071c7e07da76da81dd34ad",
    "signature": "0xb48a029e30e0eb2420b632c4fb912f64fc451c182847587f3819659fc21326a377d89bab5acea4ab788c3e93d7847cb6ba56cf5e53ea72b9f63764a6a375674b1c",
    "signer": "0xd3921A005099e6713f842e0c7Fb203E78a7C7Cbf",
    "userId": "125856948"
  }
}