{
  "manageEntity": {
    "action": "Save",
    "entityId": "98421",
    "entityType": "Track",
    "nonce": "0x31e0dd62c4f2488a797b5ef9382b57fa0781cfca2f0978ecace1f4daaf005c3d",
    "signature": "0x860b28cdc3b9bd43834ee5e9174e5ef2a319557aae016e0f303017106c02673d7932f304d376a5e6f2d3acd03586d996e5b366e82b76b352a0e148c9beb1f30e1c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}