{
  "manageEntity": {
    "action": "Save",
    "entityId": "1662979906",
    "entityType": "Track",
    "nonce": "0x274d061ddf74bb77a72bb121cdbbb1849079245ffe7a04ef94e7ddce34ce6960",
    "signature": "0x70c0ac1d5c8bc34c68644db9b89317e6713ef2cd06577698db0d04616b20f1a8578d817f0ab40868722f7cfdc402c1c50088d4681612fec8b7d738aafe703d701b",
    "signer": "0xC9e4fe89311517E71e968f6DE26A6c075A639F41",
    "userId": "964899801"
  }
}