{
  "manageEntity": {
    "action": "Save",
    "entityId": "1012178",
    "entityType": "Track",
    "nonce": "0x939f402bd9f7d5534d0cb4f672ced795173f3d9e31db986a219e46ace7ebd6ea",
    "signature": "0xbf9fd2b9b70f52103688f448aa6b01ef2d8a903732f0708f56970e85a0b237ac33cc8f7a1cf0e9a9e907414a3ff7b2b6bf66704acca354f7fe219bc120f5f1801c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}