{
  "manageEntity": {
    "action": "Save",
    "entityId": "2029781509",
    "entityType": "Track",
    "nonce": "0x4420cf4a9eb49c19f0b62bebb07a85efecd3e9c4ca865c22c714a38f26a864f2",
    "signature": "0xdabc69dadb530732c30ca142c23bfdcda2815400a26137c6c09bcaef82b87dad5a456f3516cad16a646f2a17dedc8f0e005cccbbca99080a7341b9fbcc260b671b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}