{
  "manageEntity": {
    "action": "Save",
    "entityId": "380235",
    "entityType": "Track",
    "nonce": "0xdb757db819b3ed849a381a3369e60660014e0c043e788016844081c7adb1d57b",
    "signature": "0x38b5091e9aac6fe070d03e4dfc5aa58d426ba7c82a452ba14da21cd0b31adb1660edff4de3fec34938d5ef394a6640f23a2ade80eb8914bc414759ca23496a321b",
    "signer": "0x8E12224e4dDc1BdfeC3d5Bf01DB7e4Ec17403ABa",
    "userId": "627040654"
  }
}