{
  "manageEntity": {
    "action": "Save",
    "entityId": "2083704954",
    "entityType": "Track",
    "nonce": "0x3a3560ad2c709ca3be8513c6df1147c3374797ab17e3b4073371d9e7a0a00d5d",
    "signature": "0x4d6b448b8d4f779575d800791af94b698f28a651fff5874c81dd951a3602555b5578b6231213df3cf66d85a66c639d2926a3499bf0395ff4b695f395e7a1f81b1c",
    "signer": "0x27eB4b469aE053b72c26B3e9c68a655390Fe24fB",
    "userId": "42216"
  }
}