{
  "manageEntity": {
    "action": "Save",
    "entityId": "1820317319",
    "entityType": "Track",
    "nonce": "0xcd91aa30cdb8974a6dd636d8fed43235b38184b74688fb30290c879c72056461",
    "signature": "0x7147bd224ee4d547c958dc1a25e7fbae1a2ae450d9f904c9ad623e4b0c8d966f4a7952949d40abde38bc08f8bbd86d58f8208ccb73b0fc2c77235050e0910e321c",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}