{
  "manageEntity": {
    "action": "Save",
    "entityId": "411439786",
    "entityType": "Track",
    "nonce": "0x518f2802714baf1edc5a1f093d077d3860582e31f9890163379ec2cecf9b3aa6",
    "signature": "0xa20b27c3e59c2f4a439a4bc6a780c05ab9a226b1a77790f3119caf40f5d78beb4773db60dea0b2ba8171d19ed0afefa63543f4952b95e11e48028fdef1e626731c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}