{
  "manageEntity": {
    "action": "Save",
    "entityId": "1505065080",
    "entityType": "Track",
    "nonce": "0xaad66ebdd4b4d389142707ff39957aaac1203121b7e38458fa030a048a612b89",
    "signature": "0x68bf1aecf1de143e3ce9249c9a48850bb3aec31667c57f72c7757de1854034291fdd4f82d2f949dcc6373cad1767c7f86b81e832fa0b9933684b501a78e776ce1c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}