{
  "manageEntity": {
    "action": "Save",
    "entityId": "1226818179",
    "entityType": "Track",
    "nonce": "0x4cfa7ff93d84e750c4411d5a8ab5280d6e89d1026a91f8c322396a1c5902c65c",
    "signature": "0x046ec098f2f8d1aa255471d2dddb8164788191a3f235dee0d7ed8089c042ae8d5a320f99de96338f1027e98f0e47b8f684f053b2a829f39650b32d43e5a2a5781b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}