{
  "manageEntity": {
    "action": "Save",
    "entityId": "355724766",
    "entityType": "Track",
    "nonce": "0x39b5f8b81c10e93639d479f5d7772d23d7e992e54a2267eab123e10c26358c76",
    "signature": "0xde8934e75a297f8e35a19c0b1fffb2e654a177e3f91c9a6d4cc8382ecc3d86ca0cc06dd76d15e1b72fddc5bc19224aadd88ca3f3b661b80a4e402bed8ce1b4a81c",
    "signer": "0x59765b22C96E88dA578af23E8611d6ca2dcCd7C9",
    "userId": "377610060"
  }
}