{
  "manageEntity": {
    "action": "Save",
    "entityId": "80482403",
    "entityType": "Track",
    "nonce": "0x21cfa5fa62d36a7b18bc0c3a14e2a5070b4858ea3b2fd76946e5b0e5e5763c0d",
    "signature": "0xbc56b85f90c0494960252381d582deac6d061ab3d8fcef609231d5c7afd7953e32c8abda0fce0081b0b172772c305c1113900550bb50fd16347884a2fbb211301c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}