{
  "manageEntity": {
    "action": "Save",
    "entityId": "843901001",
    "entityType": "Track",
    "nonce": "0x744df2661f83f25c30c21b4b5a5b3eaff7c65749ddb71659d8ba1ffa306a5170",
    "signature": "0xd3a0da30f27af095f1f47adde8668f7a60fc28572e482f899769d1163079db4f5595e11799cb323af4b65a5ed9ad5d5f1c648923834626f639cdbf0c10983cd71b",
    "signer": "0x3CEbf9bfE1b24355cBC348701860d601E226Dfbb",
    "userId": "172240066"
  }
}