{
  "manageEntity": {
    "action": "Save",
    "entityId": "1524866242",
    "entityType": "Track",
    "nonce": "0xed3a26e66dd904bdfef5ae1e2bda9c66c8c0081160916a226137b89cf4193b6f",
    "signature": "0x4248cdb0e3a80d2cbbf1462e43fbcfac873d7c78bd8e65e8c437bdd5a7242e773d83c1ecbb712b99bdec12fdadf6b0773b01024547d5d72300c0dd734d3dded61c",
    "signer": "0x45C74e4f36E4e5064C5321eeED3748fD52B04eA8",
    "userId": "133970929"
  }
}