{
  "manageEntity": {
    "action": "Save",
    "entityId": "271495",
    "entityType": "Track",
    "nonce": "0x33ed0af6556919812be5058b02283a9d78b09ae3760409d01749e8e2e14c486d",
    "signature": "0x61e1a34d5f775fe77bb6545eb1c0c431dfd805c5842020ec1caea9219d083d070ebb931102e6feb668ee7c05058128c4d7d78367f5118de56ef7aee85d7c6d3c1b",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}