{
  "manageEntity": {
    "action": "Save",
    "entityId": "180380439",
    "entityType": "Track",
    "nonce": "0xa847bc0f427d09355b7e5f0ff245160fea40411d4a94546f443ba6eb2d115194",
    "signature": "0xa12e11e3e622692e056a792f862328e104bed162ec2f3bf4b0852a04c36f66bc6866bf4690513d85218aee8bf165ae9a6801615d1ab4346bc2eacaa53d3a04f61c",
    "signer": "0x6f2E856bAE9D99f862016d2a2A444B395a759F47",
    "userId": "206867145"
  }
}