{
  "manageEntity": {
    "action": "Save",
    "entityId": "1199968326",
    "entityType": "Track",
    "nonce": "0x47656dc8ee7380149cbe52605e4c24111e9c172ae08742e0c088b5b47fdd2f8a",
    "signature": "0xd57e801e7234311f3a440e49b0b1ede085f0f5059a16df6ab18d0428b5444897649a269cddaa0e9a4c2d7c7ae58736c13495d39252092e7eb3e47f3444d113001c",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}