{
  "manageEntity": {
    "action": "Save",
    "entityId": "419693892",
    "entityType": "Track",
    "nonce": "0xc7f97e7545fa7afb2be3c0d7220d2301a1da9cf0c32466a4ec25cb883f06d34d",
    "signature": "0xf264005e31d391dd3c2d382ce30a2270d3d6037726f464447379859fb08c41f85084a4fe2ff9839e9729b65e23f76718ee3b076f5bdabd722d2177f14067aed81c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}