{
  "manageEntity": {
    "action": "Save",
    "entityId": "1071624",
    "entityType": "Track",
    "nonce": "0x7bb789ee93188ee9a7437812797944d2781e00c88ec2270c7a02602f3ea2b51f",
    "signature": "0x81614e307bc66debf0c03b2bdf1b03b5ef07e87034b2236f2828238d9824df1749f99c7424d450b8e9f05db6412e21745bb70fe53e4c9bf452bab50864bd65ac1c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}