{
  "manageEntity": {
    "action": "Save",
    "entityId": "757077007",
    "entityType": "Track",
    "nonce": "0x70d40b0062fb4528237f8bfebf97b0b9355f09e5190ef41d62dfddb5687a6fa8",
    "signature": "0xe990aba4ea8a12219e3becf678e8bff2ddb26d56cf7eb295ef96f8622168fc670b4ffee377d0aa54868ba60876c38be9c8dbffc2864bbd0900519d97a84de0e31c",
    "signer": "0xdA0eFB0e7b973C487c12501759aDb23012CB5248",
    "userId": "178070"
  }
}