{
  "manageEntity": {
    "action": "Save",
    "entityId": "808625923",
    "entityType": "Track",
    "nonce": "0x0c8935944f4033f8314ebf79028318e4dc689f820b1e8ee1675a942948cee32b",
    "signature": "0x4fe8382ce3b3ea01a456b1d18212c94f6ec042fb11979debcc44c17dcfa68fe05686a95520fad05276d63bcf37e504beacb87284dd064518f58f54e33af8847e1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}