{
  "manageEntity": {
    "action": "Save",
    "entityId": "456818688",
    "entityType": "Track",
    "nonce": "0x7f8c337e1ea0075293655ce51392093f81228de0194a4cede7a71393bc231471",
    "signature": "0x2e8f9dfb0408235d91fa464964204e16746ddfa84b28777fb71f473e40c19eed3f8e66cef135ce51bc199965f90d0b7c16d058a46c0c6a27a3366f346ee9a9911b",
    "signer": "0x8a278E79c8E7e655B94c3e6798972A44Daa2c6ad",
    "userId": "24098924"
  }
}