{
  "manageEntity": {
    "action": "Save",
    "entityId": "81166367",
    "entityType": "Track",
    "nonce": "0xdbd6a373e7568f687d11f96f7515763c905f0788ec6adccf698b1cd23458a686",
    "signature": "0xca82aacfb83c51d468f065629084845f8ae72a90f03f60a481693c55eaea3b4310fc9dcddbd651b3c9368f186fb2965343247ab06d4347c4630209c3d96ab3ea1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}