{
  "manageEntity": {
    "action": "Save",
    "entityId": "2078115282",
    "entityType": "Track",
    "nonce": "0x4cb126df446f20f2d2f53cb0146c731bf73bf6114835e4903a735b5127361af6",
    "signature": "0x905791d28a3972afc9a4b56526ace93f3ea7c84bf6492be50198307cc4f149383803988ebae99cf807bff68e8ac4e271945a3a796c92e33404c23ff7fe9b1e9a1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}