{
  "manageEntity": {
    "action": "Save",
    "entityId": "723463",
    "entityType": "Track",
    "nonce": "0xfa50cd41e105f48c5e9023c5d158f8c95bc2a16fbf55444b808bc9ca84d0cf84",
    "signature": "0xa4d6d19d0618d937e654e06aa9ac8bc7455a1bc34982a0fd27635e693b57f6296ba2816c0a5f8b81bc70c0274ad57a3ca49fe29a9d7ce6a26bd53b4fc121dc0b1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}