{
  "manageEntity": {
    "action": "Save",
    "entityId": "1527378865",
    "entityType": "Track",
    "nonce": "0x3830368258bca3a6f4220b70453ba9bb65756240af790ed9fc1eb67f8290156a",
    "signature": "0x4a744d53abd903fa3ef434c218348021d4493d7d8dbf0e88bda95490d5f3225326876e18a25b34e2d9da9674c9ec987fa609bef03961c595df82207d937a590c1b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}