{
  "manageEntity": {
    "action": "Save",
    "entityId": "377360",
    "entityType": "Track",
    "nonce": "0x4d9108248e52019f198291bc7e66ab1efb6e8dfe510fca11ab0e7ca6e4e7ec5d",
    "signature": "0x34e9ea51d2e8a41d7e9e533b9f1982d93c54c4cee1b025ab178fe1fa19c4691d1d40f4280a0fe3a73ddb26faad8e76050051019039ddb7298682a201bb367de21c",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}