{
  "manageEntity": {
    "action": "Save",
    "entityId": "1858648200",
    "entityType": "Track",
    "nonce": "0xa4e6b0b85a6e66967949e74adcaa70c31490dda5f02feec9b867e725f366d47b",
    "signature": "0x63b81637e37a832bcf71f05bc2fc2c93a66e12ceb1c14c254b9a2eaf0e90c558004bd876c0078daeaaa0ee0d67a5d1e703c1a3e7cdf3bb219d8c2d7505d1ff191b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}