{
  "manageEntity": {
    "action": "Save",
    "entityId": "153691639",
    "entityType": "Track",
    "nonce": "0xd64b71d87735451ce4bee98e46a4424a7725d173af1454329e266b8adfbf232a",
    "signature": "0x2db61c53ba533044800a311376f9f9182a6ae110569be99d2f6c374857830c9d6b4285a6d2a5ad9932028cc6acfc5ce106c0de8f65d629c6d328320a806836f91b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}