{
  "manageEntity": {
    "action": "Save",
    "entityId": "570487697",
    "entityType": "Track",
    "nonce": "0x864e5545c9bc133fbe532b10191eda2db25cc932c3995d874e8ecb3814c41d88",
    "signature": "0xecf0d9200aafa93e96194892812c92d94ae1abcd5e63227c709a88c291a3ffc80785a330e86e18fc8afd15c7a12a4d0e32c70f3d5a16b0d93ce35980d41d0f5f1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}