{
  "manageEntity": {
    "action": "Save",
    "entityId": "1039575744",
    "entityType": "Track",
    "nonce": "0xb26be5bec55674e63dad3c45784f825b45a02cc82d3d76d1235a6d5714796ade",
    "signature": "0x6cf0bc8fcf3e70126f5d2bf80957bfcf325ecb6c6793cfda466a31b875d194926e7f818e30699a59140a1f890e39f9cec8c29b9898da4e3c9f8a959d963612311c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}