{
  "manageEntity": {
    "action": "Save",
    "entityId": "1972363845",
    "entityType": "Track",
    "nonce": "0x06e643033a09c51a3f3cdafab2202ceae42791829b0f60d3245cf5453ae169c4",
    "signature": "0xbfdc48c1b864a5f5fd299edca670ffcfc8dca240c691759f62777aeda5a8a5663671450f16ea5f6f9144d6f4726d1cbd01c0b34244455fdb316d9035440d72e11c",
    "signer": "0x88ad765B72fb060B3adbae1FA44A6C64722E1781",
    "userId": "236177"
  }
}