{
  "manageEntity": {
    "action": "Save",
    "entityId": "1001498259",
    "entityType": "Track",
    "nonce": "0x0c1b6d84e3cf6f9ad650373c17e276509de4f5cc9397b636c5efa7679a36c4af",
    "signature": "0x6ccb5c510563ca19952bcaac050656123ee1a798e35e64b3ad86f0a0105f877249b1323bd0646ec81e559e5ea1f12b1b7cc86fac35f663d6eddf365f9d0497f51c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}