{
  "manageEntity": {
    "action": "Save",
    "entityId": "1186053598",
    "entityType": "Track",
    "nonce": "0xb562d47bcc50c688fbdd9ac56ad9710e0155a0dbca1470e78975521dc2b56a83",
    "signature": "0x7ad80c4f13ff1f2b4d02bd16abdf0901e8fa0622346a6dbe98e185d2dd4f19af542352c9fbaeb58145db07772c74fc70242de9a5ec9852837852ef581c1695c41c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}