{
  "manageEntity": {
    "action": "Save",
    "entityId": "318589115",
    "entityType": "Track",
    "nonce": "0x4693da5074830b433f586ba9c7c83f335a1cd3606f0f785f284a82705a290095",
    "signature": "0x7ffddf3624d6537d82d1498f5c529acbc22b1692169074bd2c0288bc8f0dab756794687851b8d0689400a977ca2518081d54c0ca7a44a11f07ceab5a96cc67be1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}