{
  "manageEntity": {
    "action": "Save",
    "entityId": "879315645",
    "entityType": "Track",
    "nonce": "0x0dd2e7b6e2632651f5a93b0eaf9370e026d8dea6d383ac32c732fca31b0c5330",
    "signature": "0x6bea1c3da1bf867e7d4023a97629ddf7ce3e979349466e57040086f91bd127bb797247150bbe5aa59d45eed730659544b3d355d8324254c621b219efbfb03a771b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}