{
  "manageEntity": {
    "action": "Save",
    "entityId": "732883020",
    "entityType": "Track",
    "nonce": "0x6422b806e48feaa67eea9b92d26de3250d56bfaba9127937c2a7c0d321ef9dcd",
    "signature": "0xaeb0213be0934ae7e0847ff5a726c8f84fa69e32564df945a6efb87256fc3b5c750b054cfb65ff2990f4bb9f4684fca51af94cece481f84a05e6dd9dd1cb74e01b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}