{
  "manageEntity": {
    "action": "Save",
    "entityId": "301630347",
    "entityType": "Track",
    "nonce": "0x37c1ec09d5bb35194f84ed979231f3aa87d5b618ab644c2141f1c5a89d79b617",
    "signature": "0xced7170feb04fd5be0deddf83126e0180d7f63cb312d9b966ed82ce80a73a7fc150770cb2aefe59aeffe7d157c15af5ba574a8470d1ad3d9238062d91995af6d1b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}