{
  "manageEntity": {
    "action": "Save",
    "entityId": "702196",
    "entityType": "Track",
    "nonce": "0x658ee2e1ae4724125552c30dd8802e1d73020a8768516519475b0da365221364",
    "signature": "0x7cb397a1190fe0a667ca20602e0ebbc2a740395bceca5921a1c3011eb0132da67715e78562c0011875b236d9af1690fc7802c4c0f46d90670433a7d912f11c031b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}