{
  "manageEntity": {
    "action": "Save",
    "entityId": "360654966",
    "entityType": "Track",
    "nonce": "0x73565306c972b755c2f0b220ed84fa6ac49ba2a9d138a874b733d475241fde85",
    "signature": "0x3c5ed1c2f78dd2ed2460e69ca8e89f92ac37ffc005dc5bf5d8b09eb14ec1a53824a1d039aa2c1572b0d723b29ae22f777fedfe097f8055c7ca879d0a95b243461b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}