{
  "manageEntity": {
    "action": "Save",
    "entityId": "851094949",
    "entityType": "Track",
    "nonce": "0xc90b3d1f97420c5e5cb3b7550ea1315b11210054cc233e8273c1f42dd7967b5b",
    "signature": "0x55bafca0bd76cb1a57339c0f5485a445d202ee651c0b8504e37aca634472cad45a2aab0784b52f0e88d755b7935d56a06308a7a894d427a7b9a18244e11a45d31c",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}