{
  "manageEntity": {
    "action": "Save",
    "entityId": "1142787428",
    "entityType": "Track",
    "nonce": "0x53edeff02bce48e8da4fa99eb02d5da4f3acdc485545fa9e0561fa03568756f5",
    "signature": "0xacc3f75af6a3995c80412dd239595e9b053ff47360bdd7df8f96737d6284b6ac7dc647c114156fbf848a1f4086bf411388e9df5f04225cb9d83035e3b48dbb531b",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}