{
  "manageEntity": {
    "action": "Save",
    "entityId": "1775321349",
    "entityType": "Track",
    "nonce": "0x86764ac4afbec7046f19603b8736f97c49537a5fdf32fb9d7ed1cd7868523d1c",
    "signature": "0x7df9688d04fb996d47dc611791b005ce21df304dcc2416f96d4fb622d367b9f579290344aa169b0b38b42160543d4752c9c1dc7caa1b71e403dfb2ade00969541c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}