{
  "manageEntity": {
    "action": "Save",
    "entityId": "1304965888",
    "entityType": "Track",
    "nonce": "0x56c9648b022df1b223a1e39055f5c7a722ed159cc14056291cba953c55d13f73",
    "signature": "0x1c130388b69aabb04a35556ae220420138045ed91cff526d64bc8a74274275457618a0130a164d0f593ca92e688dbb51128f7c5c87f722134228acabd1ffc6411c",
    "signer": "0xb175867C02AeCd449963dcdf49E8710D84e56b11",
    "userId": "181053434"
  }
}