{
  "manageEntity": {
    "action": "Save",
    "entityId": "129721946",
    "entityType": "Track",
    "nonce": "0x74b12c97bdf60d0df601d35b210d41702e370ab4248799088828e387a91ce552",
    "signature": "0x9b0b3314a0a1bbe2deea5847a8010c621289c378325c7226848d43981e19002f04109bd8ae89cbbdd8944c5ea83d973fda449cf36e18d33fa16317255843c33a1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}