{
  "manageEntity": {
    "action": "Save",
    "entityId": "123161354",
    "entityType": "Track",
    "nonce": "0x774a34de3fb03462660ae67df9f5d39d93a24d482790c384cf29b557b0b47cff",
    "signature": "0xdb578b88a25805393ea0918088e42c6209f2b5f0832f690d609adeb725b1a3615218727f29f22d904938702ee620ab585f668101ef8c47fa3fbfffd3797c0bcc1b",
    "signer": "0x61C76C4Ba2B5e25fe39F45EF86dbC2749f46d77F",
    "userId": "183994"
  }
}