{
  "manageEntity": {
    "action": "Save",
    "entityId": "468130493",
    "entityType": "Track",
    "nonce": "0xa240e6667fd4446ce07c77d199bb407ec101c56d770d502cb16282b432b5ab83",
    "signature": "0xd75d44892087d0b96c2eb5277dff051a2d1ad2aa961610aa1f53385860a34e3f09d2227b8b9c1a699487b43463991f0b43491ad87fe3b72e42b98d83385c8d8e1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}