{
  "manageEntity": {
    "action": "Save",
    "entityId": "1497470580",
    "entityType": "Track",
    "nonce": "0x6c4f0615c0294fce3d3de6b23a4bc4d6a99e6dfc00cf57e4c9543fb871e40d9a",
    "signature": "0xbdfabbab15434193aaf4949a7265652ceee0fe7af327b088101444c42b99724f682c26fad754a710cd504485ed9fd526714d3829581d08c5d1303f13355d9e191c",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}