{
  "manageEntity": {
    "action": "Save",
    "entityId": "692963",
    "entityType": "Track",
    "nonce": "0xb9f076b0efce2a55ef72cc795a23bf5f55c119c504c68c6a621d9bc3056bfa6b",
    "signature": "0x1f00308da5785d8be7c31b906ea0b33df6a8ac0470bd882eaca0c8e78f28f25d190ae6a040d2c2b0d4fe11f24220dd2762a31c775aa63bc5a362afffd7ec85a31c",
    "signer": "0x2B28feb1CA15953a5a910C4E741698a24e8b3FE9",
    "userId": "887020893"
  }
}