{
  "manageEntity": {
    "action": "Save",
    "entityId": "1474288224",
    "entityType": "Track",
    "nonce": "0x053c3a1d0a804af621a0e1f5aa059fa778007a45ae753fe4d651052ad2124b65",
    "signature": "0xda26463cd07d1f9ea85f05feda75b86cdbd60c42f1e0d1e8bb770eba6cbe93441ef7854a9fb45836715583783db1745449e78e0b5f83ebe3eb88fa57944f97341b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}