{
  "manageEntity": {
    "action": "Save",
    "entityId": "619796682",
    "entityType": "Track",
    "nonce": "0x4b77d05feed2279dc57402a4a925b5d14bfc7feede62b6e8d13ffdeacc44203a",
    "signature": "0xcc27ee911dd8ae779ce9f61c0367719a726b8624d21b4fdc4b957e76597460b332b9d0dace33b7adc8f4f5003682180491ebbc2c618f280ee0bbe8b94ab32b651c",
    "signer": "0xAf1f176E32866fb97d822F6f5222061aF11ef652",
    "userId": "954117045"
  }
}