{
  "manageEntity": {
    "action": "Save",
    "entityId": "764699272",
    "entityType": "Track",
    "nonce": "0x07c4dfb09a143fa3576f80d38d69b04fba5c1651c2f51d9365d71fe78546d5f2",
    "signature": "0x3e6a85c4db5f76d912a4a8f2d069247d1dc691e361829cfb4186403c1a35c4226005bba37b0bfe14d975800f5922b86adaf58eefc3ad82779407935ba5dee0c81c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}