{
  "manageEntity": {
    "action": "Save",
    "entityId": "1637136909",
    "entityType": "Track",
    "nonce": "0x456a65bc8825b1c6e177c2a91dc222daa539368ee304442ac0507a406313918d",
    "signature": "0x91b2b4ce71a6c4593bd5783f900c51728fc3f92ffd2cc744661f0b7a981db16a09de2488d6f0e72401e55fedfc453d2869c1cd1edd3f891fe8000aaf24663e101c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}