{
  "manageEntity": {
    "action": "Save",
    "entityId": "1959250216",
    "entityType": "Track",
    "nonce": "0x2ede5d11f9f827862fb88426ba1849f3d001878fe6a3575145b5e6ebf25eed29",
    "signature": "0x5698f6ab8a4fc023a75d384f9e749a8a03021b09e468044ea2b5b041f0ef29fe337a4368df0ab3750faebb02009ce3737835d49dbcb0eb47d2e1903428547bb91b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}