{
  "manageEntity": {
    "action": "Save",
    "entityId": "1861540827",
    "entityType": "Track",
    "nonce": "0xa4a94b67c124cd14e271d5c9d675201c4b4dceeeacf92951fff1a14987af92f9",
    "signature": "0x8346963369f068c36f2b80eef356bc0ee16858d1d564bbf39c1087c6beeba33d11c067397063a9b776564204da87ba0dc6518800cb4b8c5baf523c943272196d1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}