{
  "manageEntity": {
    "action": "Save",
    "entityId": "993360893",
    "entityType": "Track",
    "nonce": "0x2ae5710b32d3984eceb2cf7926a7c0323aee643ff7bd50ada46284c23f8e201c",
    "signature": "0xb1972bf0bcd5a9528d4d6d165cfda625a2272d366d8cd6830a1a31bc0db60d7a2f628a0e56840603b9c3339600f09107c8ecf8ccbbb0a0d1c5790a9aca83f3601c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}