{
  "manageEntity": {
    "action": "Save",
    "entityId": "345489913",
    "entityType": "Track",
    "nonce": "0xb5dba5d5e4a702fb19a1b8894ba08500015e5dca8d9186e8c814bbca0204e38d",
    "signature": "0x97b1d107223dab45ec3b40a60215937c0a275d119d9ae90a929a67a14bc39ff859cc866941350dff0e4e138e8732916092ce0944479edc1e64cdab7ce9e6a3311b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}