{
  "manageEntity": {
    "action": "Save",
    "entityId": "322639",
    "entityType": "Track",
    "nonce": "0xc0ecce153029d6117b0e9f420986365c7ab301f936495d1045099e533ad0ef78",
    "signature": "0xec44c1aacd2cadb6b29951b89399bc5f47f1e5c20f859ae294c2b1e2e5ad009a45a2b45db20f780fecbafb968b4968d5b80d315ebc003be7e90cab11a097f5131c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}