{
  "manageEntity": {
    "action": "Save",
    "entityId": "1375273447",
    "entityType": "Track",
    "nonce": "0xb42d61b37992f724610acabca1a1b6e44fdcade364080f7720aabe068308cd80",
    "signature": "0x951224204e14a11ebab116ecd0b61788af7a288b66b908027a6365d51d755f3479c5d8f2ca66c1dfdac1e413d26f1ef9a5109b2960f4f1e724fa577e4f7b976f1c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}