{
  "manageEntity": {
    "action": "Save",
    "entityId": "87224547",
    "entityType": "Track",
    "nonce": "0x7a8e5e4c87da8e539e45d5563c42e7231765cd54157d1ae920962960fd227181",
    "signature": "0xd3d282f07c9be790eb628da7d1ece39ee05fe9e8569476ab8266f970ac99ccfb1f07750e7d9618fbc5618506e2e11c4562b2aa9410eb730dc5ac6cc5a188f0d81b",
    "signer": "0x061A60900C738C67bcf3F9Cb7Fe8f703DbEc8Ee0",
    "userId": "718327235"
  }
}