{
  "manageEntity": {
    "action": "Save",
    "entityId": "1980795947",
    "entityType": "Track",
    "nonce": "0x3d6c3d51a3e10308b092864e8348b6d9c7100f0a48833d6e9df5f4be74487d23",
    "signature": "0x778900f7386db130adfa9d5a252712cb15c7c32040a0b97040ba365d3368a7406d671ef2ce6269a28ebcfdcd5d4f7fcea74fe0b5f8066150446875884f88fb091b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}