{
  "manageEntity": {
    "action": "Save",
    "entityId": "705321019",
    "entityType": "Track",
    "nonce": "0x03fbc2c73bdf747c18ff725acca9dc98c270ea0761083229f191bf910f01d12f",
    "signature": "0x06d14912f2d92f071d39ccebca87ca6967c85940fd5b7110349fae2c8ec9a7f80922170c56c1b4ec967847bf8b58c4da8c3a6691e6978cb728824f2240af179c1c",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}