{
  "manageEntity": {
    "action": "Save",
    "entityId": "2020871530",
    "entityType": "Track",
    "nonce": "0xd40ee38f85b21986624eaf895f3196195f77b3f68cab720a4b2d85c2ec965e34",
    "signature": "0x905f3d2c914722ee31bf747f6df42dad5d6695fff23d14c4f110a011053b123a7afbf8bc542219db5ee0f973f71788ff8b1c577ca915dc5623ba6c8bb127a3231c",
    "signer": "0x742Fff9be20F80Ce7285c8Ab12B9018Ef3Cf14F0",
    "userId": "111467392"
  }
}