{
  "manageEntity": {
    "action": "Save",
    "entityId": "1662414175",
    "entityType": "Track",
    "nonce": "0x6eaec83ce49b6461782d86623c92ca19586ae9f2699590bdb66a59fd16cec088",
    "signature": "0xf27499bd117db6bf98b1d3bf4cdfcd9834051c3f277266ab752124788f9e32111d01c2523a20abe4bf1d68466ad3aae48662d37c6a2b5e479cd6ddff733668091b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}