{
  "manageEntity": {
    "action": "Save",
    "entityId": "1765610998",
    "entityType": "Track",
    "nonce": "0x19d3e5a42b9d8a625c08af67aa020b37cdc6b3be8447c337630f502269ea3692",
    "signature": "0xc0e5a8fb67b0f7cfaf751cb40ae7a641f08930f2c5686efa0645c25496987be45856ed8b4260ab5eac4101ea4902a903c5768110c5a07a68555c461601e6a44e1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}