{
  "manageEntity": {
    "action": "Save",
    "entityId": "731331244",
    "entityType": "Track",
    "nonce": "0x19143b6ac15578079e6b5e0523f42df6d9694913eb71953f6cc239d8b5811950",
    "signature": "0x5dc7a3a388554e5c5bdf18f2649145c86645b851149eac0f755f39b200d0ab78680c6b7841e606ea2aa08d4c7befb239c2daaac556ec96e9d62a4332905d28dd1c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}