{
  "manageEntity": {
    "action": "Save",
    "entityId": "1332164291",
    "entityType": "Track",
    "nonce": "0xefea1201ac65ca138214e7b8ca978fe047ad376605384c9056284ad42935e4b4",
    "signature": "0x88aff5f34572f125bec7b121ef774bec83c27fced12b240a825ba1ace8e5d3f70f2704e0c4fa8f7c6a715c4b9eee0de2f4c05d878fcc443ae6498b35626e09061c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}