{
  "manageEntity": {
    "action": "Save",
    "entityId": "451757501",
    "entityType": "Track",
    "nonce": "0x75ff3244d3bbaac748a721bafd87dcce2b0bb200cac4b998c9762c6caf5f82b3",
    "signature": "0x4af42c3fe583c58fe182ee2c59480d40a568565d2f57325fcb62d2fa0ff4220643e70e9ac18897e8bde9d21825d2b24b3e4455a3aa81501d0d923dc5961f874b1c",
    "signer": "0x8a278E79c8E7e655B94c3e6798972A44Daa2c6ad",
    "userId": "24098924"
  }
}