{
  "manageEntity": {
    "action": "Save",
    "entityId": "1318497854",
    "entityType": "Track",
    "nonce": "0xd2868f6e08a55f57ee15c7dc61d01dcb42b1aacbe01deed04a7d9a7e6205bd42",
    "signature": "0xf61a59fd2e3fa054a4eba480dc3f311640b5acf26dcdce6f15bae010d31242552aa820860b8352fe7dac7e83fa99e99ee64c5c47fc7a69c535c5786b432558c81b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}