{
  "manageEntity": {
    "action": "Save",
    "entityId": "1984513430",
    "entityType": "Track",
    "nonce": "0x671ca2655d71a3b4881f7fa12976ca4d6ae40182555a378f5d173abdb5397084",
    "signature": "0x76efe042fde26fca39fa2df7bccea1e4e289d1ef52fe62edfbef4649cc175e49086ca3d58ad29017a73b68e094b4b6e9185b2e82555f9a350d963a5abe7d7fb11c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}