{
  "manageEntity": {
    "action": "Save",
    "entityId": "487082864",
    "entityType": "Track",
    "nonce": "0xdf05fdcd3724c36e06d581b780dcf9fa1b7cfe1f779808b4972744c1d5505413",
    "signature": "0x4b0007679eca94ed289afa98b6d8171235c25dd310cc691da9e0d2be6b185e047ddf0e7c231acf1d35d0da135799b113f03e21f8f75b076892a5480efcf56fc31b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}