{
  "manageEntity": {
    "action": "Save",
    "entityId": "1132973082",
    "entityType": "Track",
    "nonce": "0xa66213cf1d14b9d0390791986ccd08aff08016327991105dab63a1d618027868",
    "signature": "0x2a0237fdf23b4d9808192697db5b6b07dcd50f0704abd5695e819eee3eef4d502a7c094d8d6ac04cc21fec008c8314b9cb222b5755bafc601cb6a03af385e8171c",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}