{
  "manageEntity": {
    "action": "Save",
    "entityId": "1595007905",
    "entityType": "Track",
    "nonce": "0x4100156766d8f508fdeceeafaf8621bce2886b1838b6d4ec37c6e17a97830a2a",
    "signature": "0x8bf9538a629347927f8297b9ec00c266d25627b55db8e66d64f25ed303ab8a0b70c9223fd6009ea713a89e669ad290381681b94294b1500d42fca8490d009d2c1c",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}