{
  "manageEntity": {
    "action": "Save",
    "entityId": "49447360",
    "entityType": "Track",
    "nonce": "0x3d3409b49ed7a1ac0c497c1a20426fd2fc6ebaf2006843fe926cf23384119967",
    "signature": "0x23ca5fa40f165bec61c48f29b3e9f6eb6b0ba3bef8b4e912a2f47179be32365d645c82d5a543026fe34921e9b0992744d2da53f1cfa6897e769b32d0d0b0032f1b",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}